SelectedCustomerLocation has not been found in the list of auto-initialized caches

Question

Follow-up question from my previous question Make a Field Mandatory on the Graph Level.

After applying the answer from my previous question by removing the underscore (_) from my TableColumn, it is obvious that the Customer Locations screen is now picking up on the code customizations, so I accepted the answer there, as my new issue is sure to require a different solution.

Upon loading the Customer Locations (AR303020) screen, I am now receiving this error:

Failed to subscribe the event PX.Objects.AR.CustomerLocationMaint_Extension::SelectedCustomerLocation_UsrDCLID_CacheAttached in the graph PX.Objects.AR.CustomerLocationMaint. The method signature looks like an event handler, but the cache SelectedCustomerLocation has not been found in the list of auto-initialized caches. Remove unused event handlers from the code.

I used the OVERRIDE ON SCREEN LEVEL button from the Layout Editor to generate what I would assume to be the correct code stub.

This is the stock code produced:

using System;
using PX.Data;
using PX.Objects.CR;
using System.Collections.Generic;
using PX.Objects;
using PX.Objects.AR;

namespace PX.Objects.AR
{
  public class CustomerLocationMaint_Extension : PXGraphExtension<CustomerLocationMaint>
  {
    #region Event Handlers



    protected virtual void SelectedCustomerLocation_UsrDCLID_CacheAttached(PXCache cache)
    {

    }



    #endregion
  }
}

And this is after my simple Required modifications:

using System;
using PX.Data;
using PX.Objects.CR;
using System.Collections.Generic;
using PX.Objects;
using PX.Objects.AR;

namespace PX.Objects.AR
{
  public class CustomerLocationMaint_Extension : PXGraphExtension<CustomerLocationMaint>
  {
    #region Event Handlers


    [PXDefault]
    [PXCustomizeBaseAttribute(typeof(PXUIFieldAttribute), "Required", true)]
    protected virtual void SelectedCustomerLocation_UsrDCLID_CacheAttached(PXCache cache)
    {

    }



    #endregion
  }
}

From here I save my code changes and publish the Customization Project. Then, when I refresh the Customer Locations screen, I receive the aforementioned error.

You can see here that the Data Class for this form is PX.Objects.AR.SelectedCustomerLocation

But when I inspect the field on the page, it shows the Data Class is Location, which I've found correlates to PX.Objects.CR.Location. I believe the AR.SelectedCustomerLocation extends CR.Location

I'm not really sure where to go from here. Given that the system generated the SelectedCustomerLocation_UsrDCLID_CacheAttached method then I have to believe this is the event handler that is needed. I have tried changing this to Location_UsrDCLID_CacheAttached, which causes the error to go away, but the Requiredness of the field is not there, so I do not believe this is the correct method signature.

How do I get the SelectedCustomerLocation cache to exist on this page? Do I need it to exist? Should it just be Location?

Answer 1

Location_UsrDCLID_CacheAttached would be correct name as you use the base DAC name for which you are extending. SelectedCustomerLocation inherits from SelectedLocation which inherits from Location.

Try this...

[PXDBInt]
[PXUIField(DisplayName="DCL Account ID", Required = true)]
protected virtual void Location_UsrDCLID_CacheAttached(PXCache cache)
{

}

You can add the PXUIRequiredAttribute if you need a conditional requirement. Example:

[PXUIRequired(typeof(Where<INItemSite.overrideInvtAcctSub, Equal<True>>))]

You can use PXUIFieldAttribute to set the required property on the DAC, Graph cached attached, or in logic such as the RowSelected event or a graph extension initialization.

Example:

protected virtual void Location_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
{
    PXUIFieldAttribute.SetRequired<LocationExt.usrDCLID>(cache, true);
}

For more flexibility you can check for the condition in the rowpersisting event like so...

protected virtual void Location_RowPersisting(PXCache sender, PXRowPersistingEventArgs e)
{
    var row = (Location)e.Row;
    if(row == null)
    {
        return;
    }

    var rowExt = row.GetExtension<LocationExt>();
    if (rowExt != null && rowExt.UsrDCLID == null)
    {
        if (sender.RaiseExceptionHandling<LocationExt.usrDCLID>(e.Row, null, new PXSetPropertyException(ErrorMessages.FieldIsEmpty, typeof(LocationExt.usrDCLID).Name)))
        {
            throw new PXRowPersistingException(typeof(LocationExt.usrDCLID).Name, null, ErrorMessages.FieldIsEmpty, typeof(LocationExt.usrDCLID).Name);
        }
    }
}